package com.briup.MR.Sort.normal;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.KeyValueTextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;

/**
 * yarn jar HdfsClientDemo-1.0-SNAPSHOT.jar com.briup.MR.Sort.normal.NormalSort -D input=/user/hdfs/wea.txt -D output=/user/hdfs/w_result
 *
 */
public class NormalSort
        extends Configured implements Tool {
    public int run(String[] args) throws Exception {
        Configuration conf = getConf();
        String input = conf.get("input");
        String output = conf.get("output");
        conf.set("mapreduce.input.keyvaluelinerecordreader.key.value.separator", ",");
        Job job = Job.getInstance(conf);
        job.setJarByClass(this.getClass());
        job.setJobName("NormalSort");

        job.setMapOutputKeyClass(Text.class);
        job.setSortComparatorClass(DescSort.class);

        job.setNumReduceTasks(2);

        job.setInputFormatClass(KeyValueTextInputFormat.class);
        KeyValueTextInputFormat.addInputPath(job,new Path(input));
        TextOutputFormat.setOutputPath(job,new Path(output));

        return job.waitForCompletion(true)?0:-1;
    }

    public static void main(String[] args) throws Exception {
        System.exit(
                new ToolRunner().run(
                        new NormalSort(),args));
    }
}